A halt in the secular trend towards earlier menarche in Denmark
A halt in the secular trend towards earlier menarche in Denmark
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DOI：
10.1034/j.1600-0412.1998.770213.x
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发表时间：
1998-02-01
影响因子：
4.3
通讯作者：
Gronlund, L
中科院分区：
文献类型：
--
作者：
Helm, P;Gronlund, L
背景在一些国家已经报道了月经初潮年龄下降的停止，但在丹麦还没有记录。1996年，采用现状法对丹麦某个地区5至10年级（n=979）的全体女生进行了调查。1966年和1983年在同一地区用同样的方法进行了类似的调查。采用概率单位法估计平均年龄和标准差。平均年龄为13.00岁（s.e.= 0.080;标准差=与1983年的平均年龄（13.03岁）基本一致，但与1966年的平均年龄（13.40岁）有显著性差异。结果表明，在1966年至1983年的某个时候，该地区月经初潮提前的长期趋势停止了。
Background. A halt in the decrease of menarcheal age has been reported in some countries but has not been documented in Denmark.Methods. The entire population of schoolgirls, attending grades 5 through 10 (n=979), in a particular region of Denmark was investigated by the status quo method in 1996. Similar investigations had been made in the same region and by the same method in 1966 and 1983. Mean age and standard deviation were estimated by probit analysis.Result. Mean age was 13.00 years (s.e.=0.080; s.d.=1.15) and almost identical with the mean age in 1983 (13.03 years), but significantly different from the mean age in 1966 (13.40 years).Conclusion. The results indicate a halt in the secular trend towards earlier menarche in the re ion at some time between 1966 and 1983.